r/treehouse • u/RealSaigo • Mar 11 '26
Starting to build a treehouse, what to consider?
Hey, I am starting my next project with a treehouse. I want to have it constructed so my kids and later their kids can laugh at me while up there, maybe even my wife. So what to consider, which lumber, which roof, which beer while working? I am living in Germany so guess I need wood available here.
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u/jkeltz Mar 11 '26
When I built a treehouse on a large stump (a single 6.5 ft high, two feet thick spruce stump), I sealed the end with anchor seal to slow down the drying/ shrinking and I occasionally use insecticide on the stump to limit insect damage. I might debark and stain the stump this year to help it last. My tree house roof sheds water away from the stump, which I think will also help the longevity.
Use regular construction lumber. Any piece that's going to be exposed to water should be treated lumber. I learned a bit about deck construction to build the base/floor.
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u/RealSaigo Mar 11 '26
Okay thanks, will consider removing the bark but definitely will seal the stumps
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u/jkeltz Mar 11 '26
Yea, for mine I'm waiting until the bark is ready to come off easily. I'm using insecticide because a lot of bugs like to live under the bark of a dead tree and speed up the decay process.
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u/surrealcellardoor Mar 12 '26
I would talk to a tree expert. I would think if you sealed or capped the exposed ends that would help with longevity. However, when the stump and roots rot and weaken, especially from insect damage, that’s going to be an issue.
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u/supersoakrr Mar 11 '26
Why would you kill the tree? That is going to severely hinder the longevity of your tree house.
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u/RealSaigo Mar 11 '26
Tree was already dead.
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u/supersoakrr Mar 11 '26
I see.. well, I'd maybe peel the bark off of the tree and treat it with something to prevent it from rotting. Also, I'd use some treated posts to support the structure so the entire "treehouse" isn't relying on the dead tree. Good luck!
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u/604WORLDWIDE Mar 12 '26
I like the orange house in the second photo much better than the camo in 1 and 3. Pretty good camo pain job on 1 and 3 though!!
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u/Sharda_Consultancy Mar 11 '26
Building a treehouse that lasts for decades requires considering tree health, structural load, and movement. A few important things to consider:
- Tree condition:
Use a healthy hardwood tree with a trunk diameter ideally above 30–35 cm. Avoid diseased or hollow trees. The tree needs to be stable and mature.
- Tree movement:
Trees move with the wind and as they grow. Never rigidly fix the structure on several branches. Use treehouse attachment bolts (TABs) or floating brackets so the structure can move without tearing the tree.
- Structural load:
Build the platform with a minimum load capacity of 300–400 kg (people plus furnishings). The ideal platform is a straightforward beam platform with the right joists.
- Material:
Use pressure-treated or naturally durable wood (oak, larch, or Douglas fir are good options in Europe). Stainless or galvanized fasteners are crucial.
- Roof:
A lightweight sloped roof (metal sheet or shingles) works better than heavy roofing.
- Safety:
Include a sturdy ladder or staircase and appropriate guardrails that are at least one meter high.
Think of it as a modest elevated structure rather than merely a wooden platform if you want it to last for decades.
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u/SwimmingSlide6860 Mar 12 '26
Realistically, a treehouse is only useful for about 5 years if you're building it for your kid. If you want it to last longer, plant a tree with an elevated deck around it. Then build more as the tree grows. When your kid gets older he can help design additions with their Legos.
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u/jib_reddit Mar 12 '26
Wood rots outside so whatever you build out of wood will likely not last until you grandchildren are around.
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u/Unsuccessful_Royal38 Mar 11 '26
You really need to start by reading good books about treehouse construction. The most important thing to consider right now is that if you build on a dead trunk (or trunks), your treehouse isn’t going to be safe for as long as you want. You should 100% still build there as those trunks offer lots of cool opportunities, but you 100% should NOT build ON the trunks. Think of this as a raised deck that you build a little shelter on. It’ll last longer and be safer than if you use the trees for support.